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    <item>
      <title>REM-Schlaf und Katecholaminausschüttung: Eine Untersuchung mit Elitesportlern</title>
      <pubDate>Mon, 01 Jan 2001 13:19:32 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/3032867</link>
      <guid>https://sponet.de/sponet/Record/3032867</guid>
      <author>Netzer, N. C.</author>
      <author>Kristo, D.</author>
      <author>Steinle, H.</author>
      <author>Lehmann, M.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Ausdauer</dc:subject>
      <dc:subject>Belastung</dc:subject>
      <dc:subject>Radsport</dc:subject>
      <dc:subject>Training</dc:subject>
      <dc:subject>Wettkampf</dc:subject>
      <dc:subject>Schlaf</dc:subject>
      <dc:subject>Hormon</dc:subject>
      <dc:subject>Stoffwechsel</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Netzer, N. C.</dc:creator>
      <dc:creator>Kristo, D.</dc:creator>
      <dc:creator>Steinle, H.</dc:creator>
      <dc:creator>Lehmann, M.</dc:creator>
      <content:encoded><![CDATA[Zielstellung:
Untersuchung des möglichen Einflusses von Katecholaminen auf die Schlafstruktur bei Ausdauersportlern.
Methoden/Probanden:
Probanden waren 13 Straßenradsportler, alle Mitglieder der deutschen Amateurnationalmannschaft, Durchschnittsalter 23,9 Jahre. Jeder Proband wurden während des Trainings nach einem Wettkampf (C) und später in einer Wiederherstellungs-/Ruheperiode (R) ohne Training und Wettkampf untersucht. Die Schlafstruktur wurde mittels Polysomnographie untersucht. 
Ergebnisse:
Die Nacht- und Tagausschüttung von Adrenalin und Noradrenalin war nach Belastung signifikant erhöht. Die REM-Schlaf-Latenzzeit war in der 1. Nachthälfte unter Trainingsbedingungen im Vergleich zu den Ruhebedingungen signifikant erhöht und der REM-Schlaf signifikant vermindert. Die REM-Latenzzeit korrelierte mit der erhöhten Adrenalinausschüttung am Belastungstag.]]></content:encoded>
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    <item>
      <title>REM-Schlaf und Katecholaminausschüttung: eine Untersuchung bei Elitesportlern</title>
      <pubDate>Mon, 01 Jan 2001 13:19:32 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4005866</link>
      <guid>https://sponet.de/sponet/Record/4005866</guid>
      <author>Netzer, N. C.</author>
      <author>Kristo, D.</author>
      <author>Steinle, H.</author>
      <author>Lehmann, M.</author>
      <author>Strohl, K. P.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Ausdauer</dc:subject>
      <dc:subject>Hormon</dc:subject>
      <dc:subject>Radsport</dc:subject>
      <dc:subject>Schlaf</dc:subject>
      <dc:subject>Stoffwechsel</dc:subject>
      <dc:subject>Training</dc:subject>
      <dc:subject>Wettkampf</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Netzer, N. C.</dc:creator>
      <dc:creator>Kristo, D.</dc:creator>
      <dc:creator>Steinle, H.</dc:creator>
      <dc:creator>Lehmann, M.</dc:creator>
      <dc:creator>Strohl, K. P.</dc:creator>
      <content:encoded><![CDATA[We investigated the potential influence of catecholamines on sleep architecture in endurance-trained athletes. The hypothesis was that endogenous levels of aminergic neurotransmitters influence sleep architecture. Thirteen well-trained male street cyclists (all members of the German national amateur team, mean age 23.9 years, mean body mass index 21.9 kg/m2) completed the protocol. Each subject was studied during training after a race competition (C) and later in a recovery/rest period (R) with no training and no competition. Polysomnography (PSG) was performed for one night (C) and for a second night some weeks later (R). Urinary levels of catecholamines collected during the preceding day and over the night of PSG were used as an index of excretion rate of circulating adrenergic agonists. Nighttime and daytime excretion of epinephrine and norepinephrine was significantly elevated after exercise (C vs R; P<0.01). Rapid-eye-movement sleep (REM) onset latency was significantly increased (P=0.03) and REM was significantly decreased in the first half of the night in the training compared to the resting condition (C vs R, P=0.05). REM latency was correlated with increased epinephrine excretion on the day of exercise (C, r=0.63, P=0.02). The temporal appearance of REM during the night appears to be affected in part by the intense exercise associated with race competition, and urinary catecholamines are markers that are correlated with this alteration in REM appearance. ]]></content:encoded>
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